Two large milling machine models complete new intelligent F-Series line-up from Wirtgen
WITH the launch of their new generation of large milling machines, Wirtgen say they have made lasting improvements to the process of milling in terms of performance and efficiency. The cold-milling machine specialists have now added the W 220 Fi and W 250 Fi flagship models to their intelligent F-Series line-up.
With an engine power of 812PS (W 220 Fi) and 1,024 PS (W 250 Fi), respectively, the new large milling machines serve a wide range of applications at a maximum milling depth of 350mm – from surface course rehabilitation and fine milling work to complete removal of the surface.
Various drive concepts are available to ensure maximum, optimal milling performance. For example, the W 220 Fi is equipped with a two-speed Dual Shift powershift transmission, whilst the W 250 Fi has an Active Dual Power dual engine drive.
Like the successful W 200 Fi, W 207 Fi and W 210 Fi F-Series models, the W 220 Fi and W 250 Fi are also said to set new standards in terms of milling performance and machine efficiency.
In the automatic mode, the Mill Assist standard assistance system provides the optimal balance between performance and operating costs, which not only improves milling performance, but also reduces diesel, water, and pick consumption, as well as CO2 emissions.
The machine operator can also pre-select a working strategy from ‘Cost-optimized’, ‘Performance-optimized’, or ‘Milling texture quality’. For example, it is possible to define the required milling texture quality on a scale of 1 (coarse) to 10 (very fine) in advance at the touch of a button.
Mill Assist also automatically controls the two-speed Dual Shift powershift transmission. Together with the diesel engine, the intelligent control of the two-speed powershift transmission extends both the upper and lower range of possible milling drum speeds. At lower speeds, fuel and pick wear can be significantly reduced. At higher speeds, high milling pattern quality is ensured even over large areas.
With the Active Dual Power dual engine drive of the W 250 Fi, depending on the project requirements and the pre-selected working strategy, Mill Assist automatically controls just one or both motors. In addition, the engines operate efficiently at optimally adapted speeds, which significantly reduces diesel and cutting tool costs.
In addition, the Wirtgen Performance Tracker (WPT) calculates the precise surface milling performance, milling volume and consumption values for the machine. All-important performance and consumption data are displayed in real time on the operator’s platform and are also sent to the machine operator by e-mail in an automatically generated report immediately after completion of the milling work.